Preparation of Anatase Titanium Dioxide Nanoparticle Powders Submitting Reactive Oxygen Species (ROS) under Dark Conditions

• 作者: Thi Minh Phuong Nguyen Perrine Lemaitre Masaki Kato Ken Hirota Kazuhiko Tsukagoshi Hirohisa Yamada Atsuki Terabe Hideto Mizutani Shingo Kanehira
• 来源期刊: 材料科学与应用期刊(英文)
• 学科: 工学
• 关键词: ANATASE Microbial Activity under Dark Conditions Potassium K Phosphorous P
• 年，卷（期）: clkxyyyqkyw,（2）
• 页码范围: 89-110
• 页数: 22页
• 分类号: TB3

摘要

Recently, under the circumstances of pandemic of COVID-19 much attention has been paid to titanium dioxide TiO₂ as bactericidal agent;however, conventional TiO₂ requires ultraviolet radiation or visible light to exercise its photocatalytic properties and its induced antimicrobial activity. In order to expand its applications directed at wide civil life, antibacterial TiO₂ being usable under dark conditions has been demanded. The present paper describes the powder characterization of newly developed potassium K and phosphorous P co-doped nanometer-size anatase TiO₂ powders using X-ray diffraction (XRD), scanning and transmission electron microscopies (SEM & TEM), Brunauer-Emmett-Teller method (BET), fourier-transform infrared spectroscopy (FT-IR), X-ray absorption fine structure (XAFS), electron spin resonance (ESR) and chemiluminescence (CL). It was found for the first time that thus prepared anatase TiO₂ could submit much reactive oxygen species (ROS) even in the dark, which has close relation with bactericidal activity in light interception.